Propeller



' June 7, 1.932.I

H. P. MoRRls 'PROPELLER `Filed July 25. 1950 "gg" E 'i f YS ww Qi N N Il 2 Sheets-Sheet 1 June 7, 1932. H, Fs, Moms 1,862,235

PROPELLER v -f Filed July g5. 195o 2 snets-shet -2 Patented June 7, 1932 UNITED 'STATES PATENroFFIcE YHUGH PAUL MORRIS, F MILWAUKEE, WISCONSIN, ASSIGNOR 0F ONE-HALF TO SIMON 'DEUTSCE OF MILWAUKEE, WISCONSIN; EUDORA MORRIS ADMINISTRATRIX 0F SAID HUGH PAUL MORRIS, DECEASED Application lled July 25,

This invention relates to propellers and more particularly to propellers of the type em loyed for aeroplane propulsion.

ne of the primary objects of my invention is to provide a propeller in which the angle of the blades can be readily changed either during they rotation of the propeller or while the propeller is at rest.

Another prime object of my invention is l0 the rovision of novel means for supporting the lades in the propeller hub with novel means for actuating said supporting means whereby the angle of the blades can be easily and quickly changed to suit varying condi-v tions.

v A further object of my invention is the provision of a propeller embodying a hub having rotatable vsockets receiving the propeller blades with novel means for rotating these sockets to change the angle of the blades, said means embodying pusherpins slidably carried by the hub having operative connection with the sockets, with novel cam` members rotatable relative to the hub for actuating said pins.

A still further object of my invention is to provide an improved propeller of the above character, which will be durable and' elicient in use, one that will be simple and easy to 3 manufacture and one which can be placed upon the market at a reasonable cost.

With these and other objects in view the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed and illustrated in the accompanying drawings, in which:

Figure 1 is a fragmentary plan view of my improved propeller: showing the same at- 0 tached to an engine drive shaft, parts of the propeller being shown broken away and in section.

Figure 2 is a section taken on the line 2-2 of Figure 1 lookingin the direction of' the arrows and p y PROPELLER 1930. Serial No. 470,665.

Figure 3 is 'a detailed'transverse section through the hub of the propeller taken on the line 3-3 of Figure 2 looking in the direction of the arrows illustrating the operative connection between one of the pusher pins and one of the sockets for the'blades.

Referring to the drawings in detail, wherev in similar reference characters designate corfastening elements 7 The opposite ends ofl the sectional casing 6 receive sockets 8 for the shanks 9 of the propeller blades 10. As shown the sockets 8 are internally threadedand the shanks 9 of the propeller blades` are threaded therein and held against movement relative thereto by use of suitable locking rings 11. The outer faces of the sockets 8 are. rovided lwith spiral ribs 12 which are fitted 1n spiral v ways 13 formed on the inner faces of the ends of the hub casing 6. -By this construction the propeller blades 10 are rigidly connected to the sockets 8 while the sockets are rotatable in the hub.

Formed on the hub casing-6 at the axial center thereof is a hub sleeve 14 which receives the drive or propeller shaft 15 and. is splined thereon. This shaft 15 maybe the crankshaft of an internal combustion engine or other prime mover. The opposite ends of the hub sleeve 14 are preferably tapered or bevelled as at 16 and 17. The bevelled end 17 of the hubsleeve 14 fits against a tapered ring 18 fitted against a shoulder 19l formed on the shaft. A similar tapered ring 20 fits against the bevelled end 16 of the hub sleeve 14 and this ring 20 has bearing against the same a threaded head 21. This head 21 is threaded on'the threaded end.22 of the shaft 15 and a portion of the head 21 protrudes through the outer section of the sechead 21 is reduced in diameter toA provide j a shoulder -23 and the reduced end is provided with right hand threads on which is threaded the socket 24. This socket is threaded into binding contact with the shoulder 23 and the head beyond the socket is provided with left hand threads for the reception of a lock nut 25, which is threaded into binding contact with the socket.

After the socket '24 has been threaded on the head 21, it is obvious that the head 21 can be' readily threaded on the shaft 15 for holding the hub 5 of the'propeller on said shaft for rotation therewith. The socket 24 can be provided WithV suitable openings 26 for receiving any preferred type of tool for facilitating the rotation of the socket. In order to prevent rotation of the socket 24 relative to the hub 5 and the loosening of the head 21 and the propeller after the final adjustment of the head 21, suitable cotte'r or lock pins 29v are passed through the socket 24 anda lhollow lock nut boss 28 integrally l formed on a hub casting 6, which boss 28 receives the socket 24. f

. ead 21 can be used to pull thepropeller from off of the shaft after the loosening of said head.v l v The inner ends of the sockets 8 for the propeller blades 10 are provided with radial- A ly exen'ding arms or-projections'29 which have earing'ag'ainst the same anti-friction rollers 30 carried by ears 31 formed on pusher pins32. These pusher pins 32 are slidably mounted in suitable guide sleeves 33 formed on the hub castingl 6.'

The inner ends of the pins 32 are suitably connected to a pusher ring 34 carried by the hub sleeve 14. This p usher ring bears against a suitable anti-friction washer 35 and this 3 8' threaded onl the hub sleeve, as clearly shown in Figure 1 of the drawings.- The points of the cams 36 and 37 are arranged in facial relation and the cam `36 preferably carries' anti-friction rollers 39. for bearing against the pointsof the cam 37. The cam 37 is heldl against rotation on the hub sleeve by the use of .stationary brackets 40 which may be secured to any stationary part, such as the crank case of the engine. are provided"- with longitudinal slots 41 through which extendpins 42 carried by said lof the hub casting,

The brackets 40..

cam 37 which pinsv keep'the cam from turneans are provided for rotating the cam 36 relative to the cam .37 so as to slide the cam 36 longitudinally on the hub sleeve and thus bring about the desired movement of the pusher ring 34y and its pusher pins 32. As shown the cam 36 is provided with a radially extending ear 43 to which is connected an operating link 44 which can be actuated `1 inany desired Way from the cock-pit of an aeroplane.

When it is desired to change the angle of the propeller blades 10, .the operating link 44 i's operated so as to bring about the turning of the cam 36 relative tothe cam 37, so that the rollers 39 of the cam 36 will ride up on the high pointsof the cam 37 thereof bringing 4about the sliding of the cam 36 on the hub sleeve toward the hub casting .6.

' Thisvmovement of thecam 36 willfbe trans# mitted to the pusher pins 32 and the rollers 30 carried by the ears 31 of the pins pushing against the radial arms or projections 29 of the sockets 8 will turn the socket and consequently change the angle of the blades.

The air thrust on the blades and centrifugal action on the blades will tend to nor-l mally hold the arms or projections 29 of the sockets 8 against 'the ears of the pusher pins and consequently when it is desired torestore the blades to their initial position the cam 36 is rotated in a retrograde direction and the arms or projections 29 bearing against the pusher pins will push the pins 32E-and the pusher'ring 34 against the cam 36.

'While I have shown the pusher pins 32 arranged in one position on opposite sides of the hub casting-v it is obvious that Vthe pushing pins can be placed on the other side to suit dilierent conditions.

pusher ring connected with said pins, a pair of facing cam' members rotatably mounted relative to the hub, means for holding one of said'4 cam members against rotation, and

means for turning the other cam member relative to the first mentioned cam member. 2. A propeller comprising a hub including Fromthe foregoing description it can be avhub casting, anlaxially disposed sleeve carried by. the-*hub casting, propeller .blades rotatably mounted in the hub castingT and areny ranged radially of the hub sleeve, radially extending arms formed on the inner ends of the blades, guide sleeves formed on the hub casting on opposite sides of the hub sleeve, push pins slidably mounted in the guide sleeves, ears carried by the push pins, antifrietion rollers on the ears engaging said arms, a pair of facing cam members rotatll'visconsili.

HUGH PAUL MORRIS. 

